Improved machine for punching metal



tutti statte MANAND H. TAYLOR, 0F 'SAME PLACE.

Leim-Patent No. 94,857, da'ted''eptember. 14, 1869.

IMPROVED MACHINE FOR PUNCHING METAL.

The Schedulerefrred to in these Letters Patent and'making part of theSame.

To Aall 'w71 omitem3/'concern Be it known that I, JOSEPH Antenas, ofMansfield, in the county of Richland, and State of Ohio, have inventedor discovered a newan'd useful Improvement in Machines for PunchingMetals, of which the following is a full, clear, and exact description,reference heilig had to the accompanying drawings, making part of thisspecification, in whichf Figure .1 is a perspectiveview` of the machine;

4Figure 2 isa vertical sectional view of thebed-piece, die, and punch,through the line a: y; and

Figure 3 is a sectional view of a bar of metal after having beenpunched. I

Similar letters of reference indicate corresponding parts in all thefigures.

In the manipulation of wrought metals, for the purpose of giving themthe desired form or construction, or for uniting different parts orpieces thereof, for the various purposes and uses for which they arerequired,

it has been found desirable to make sockets or perforations of taperingform, adapted to receive shanks of `corresponding or wedge-form, whichcan beforccd or driven iito the sockets until they are made accuratelyto fit and lill theA same, and thereby effect a perfectly rigidandinflexible union ot' the parts.

`'lhis has been found desirable, hecauseof the .didiculty and expense ofuniting 'such parts in a manner that will -prevent all. relativemovements, Aby attempting to give to thesocket and shank an uniformdiameter throughout, a task requiring the utmost precision and vnicetyof ltting,and one which,'even -under the hand of the most skilfulworkman, frequently results i in failure toattain the desired end.

Where the socket or perforation and shank are round', the task is lessdiflicult, because, in such case,

u thelathe may be employed, but wher-ea square or an;

gular form of socket and shank is required, such as* cannot beproducedby tne lathe, and yet is essential,

to prevent the turning of thel'shank in its socket, the process becomesmuch more diltlcult of accomplishment. i

As a consequence, in machineswhere such a union offpaits'i's essentialto the proper working of the same. as, for example, in theattachment ofthe, teeth to the cylinder-bars in threshing-machines, where a slightdisplacement of a toothwouldresnlt disastrously, and to the injury, or,perhams, the destruction of the ma chine, and ina manner that wouldendanger the lives of.y thevattendants, the desired accuracy in unitingthe Y parts is frequently unattained, because of thelabor and expensereferred to, and where it is attained, it not unfrequently Happens thatafter short use, the parts become worn and loosened, andthe nuts orother fasteningsemployed, while they serve to hold the teeth in thevsocket, are found insucient to prevent their Vlateral displacement. v

If a Wedge or tapering form of socket and shank be used, it will beevident that all such wear will be compensated for by simply tighteningthe nuts, or other fastenings which bind the Atwo parts together, andthe ter or size, and whereby advantages such as are above recited areattained, without adding to the cost of. effecting the perforation ofthemetal. The character of the means employed for the accomplishment ofthis object will be best understood from the following description, withreference to the draw-- ing, in which- A is a bed-plate,perforated andeountersunk to receive a die, shown at. B, fig. 2.

O represents a bar of metal to he punched, and

D, a gUide-bar,'for eiecting the desired lateral ad` justment of the barC, relative tothe die B, and also in connection with the gauge E, makingthe desired longitudinal adjustment of said bar C.

` The guide-bar D is secured to and adjusted upon the bed-piece A bymeans of the bolts d, vthe heads of i. which are'conned in thedovetailed groove D. Y The gauge E is constructed 'so as to slide uponthe 'bar D, and is provided with a tonguegor-arm, E.

The head E is stopped at the desired intervals or distances by'meansofthe Ipin c, *actuated by the spring-latcl1- e', and entering theholesd?, in bar 1 ),an accurate adjustment of the tongue E', relative tothe die B, can be made through the slots e andscrews or bolts c4.

`F is a clamp, consisting of two alf-ms, united at one end byv atransverse bar, the oppositeends being pivote'd inlugs F F', upon therod j'.

. G is acam-roller, mounted in standards G G,-qaud rotated by meansofthe lever g.

A spring, g', serves to raise the free end of the clamp F, when the sameis not held down by calnroller GL H is a stock, to which is given adirect reciprocat ing motion, on a line coincident with the axialdiameter ofthe die B and perforation al.

I is a punch of any desired form,`but0f less diameter than the die orperforation a, and is secured in stock H, in the usual manner.

The operation of the machine is -a-s follows:

The guide-bar D is secured upon the face ofthe bed-plate A in suchposition, that when the bar C is laid closely against it, the guide-barshall be in a proper position, with reference to the perforation throughthe die B. The bar C is then adjusted longitudinally, that is, so thatthe point at which it'is desired to punch the first hole shall beexactly over the die, then the gauge E is moved up as closely to the endof the bar as it can be, and allows the pine to enter one of the holescl2. An accurate adjustment is then made by loosening the screws orbolts ci, and placing the end of the tongue E against the end of the barC, as shown in fig. l.

It will be apparent that after the above-described adjustment shall havebeen effected, any number of bars may be punched, with perfectuniformity in the distance between the holes, by simply sliding both barand gauge along until the pin 'e will entersuccessively the holes d2.

In using the machine, it will be found that if a pn-nch, having asmaller diameter than the diameter of the perforation through the die,be used, it will force out a'taperijng plug, corresponding in size atone end with the hole in the die, and at the other with the punch.

The principle upon which this is done appears to be that the inner edgesof the die act as cutting orshearing-edges equally with the outer edgesof the punch, and that as the power applied to the punch is virtuallyapplied to the die, to the same extent, although in an oppositedirection, the tendency is just the same for the die to eut a plug ofits own size, as for the punch to make a hole of its size. The result isa stam.

compromise, as it were, on a straight line between the two points ofresistance or cutting-edges l1 b t i, fig. 2, thereby producing atapering perforation, having straight sides, as shown at c, iig. 3.

In order to prevent the bar C from being warped -or sprung, therebyinvolving the necessity for subsequently staightening and consequentchangingr of the relative position of the holes, it"(the har) is heldfirmly to the bed-plate A by the clamp F, one arm of which rests uponthe baron either side of the punch, the requisite pressure being appliedby Ameans of the camroller G, while each hole is being punched, but thebar is released, so as to be readily moved along, ready for the nextone, b v reversing the posit-ion of the lever g and cam G, when thespring y will lift the clamp F.

Having now described my invention,

Witnesses e J. W. J ENNER, V. GUTzwlLLEn, J r.

What I claim as new, and desire to secure by Lct-

